Services are something we routinely experience in everyday life as consumers. Also, depending on our profession, we may deal with services as providers. School teachers, hairdressers, and airline pilots are three examples of professions that offer services to consumers. The typical domestic dwelling is connected to several services such as services for drainage, electricity, and water supply. Architects and house builders take into account the local availability of external services and arrange the house’s drainage, heating and plumbing accordingly. Gas heating, for example, requires the availability of a gas supply service. If such service is not available, the house’s heating system must be based on an alternative fuel such as oil. This will, in turn, impact other decisions about the design of the house, such as, for example, the provision of space for an oil storage tank.